Is this not the coolest thing? Finding a cage that is easy to transport and set up to relocate or return feral cats has been a huge issues for feral cat managers. The one thing I would like to see would be smaller wire, so common barn predators like mink and weasels could not get in:
From Ultra Lite Products, here:
I have two of their larger cages in by cat facility, which have stood up very well. Maybe around spring I'll invest in one of these. They are a huge improvement over a standard wire dog crate.